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Write the formulas of compounds in which the combining ratios are as follows: (a) Potassium:oxygen, 2: 1 (b) Sodium:phosphorus: oxygen, 3: 1: 4 (c) Lithium:nitrogen: oxygen, 1: 1: 3

Short Answer

Expert verified
(a) \( K_2O \), (b) \( Na_3PO_4 \), (c) \( LiNO_3 \).

Step by step solution

01

Understanding the Problem

We need to write chemical formulas based on given combining ratios of elements in different compounds.
02

Writing the Formula for Potassium and Oxygen

According to the ratio given, potassium combines with oxygen in a 2:1 ratio. Potassium has the symbol \( K \) and oxygen \( O \). Therefore, the formula is \( K_2O \).
03

Formulate for Sodium, Phosphorus, and Oxygen

For the sodium, phosphorus, and oxygen combination, the ratio is 3:1:4. Sodium has the symbol \( Na \), phosphorus \( P \), and oxygen \( O \). Thus, the formula is \( Na_3PO_4 \).
04

Writing the Formula for Lithium, Nitrogen and Oxygen

In this ratio, we have lithium, nitrogen, and oxygen in a 1:1:3 ratio. The symbols for these elements are \( Li \) for lithium, \( N \) for nitrogen, and \( O \) for oxygen. Thus, the compound formula is \( LiNO_3 \).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Combining Ratios
When creating chemical formulas, combining ratios play an essential role. These ratios indicate the proportion of each type of atom within a compound. Understanding these ratios allows us to accurately represent how elements bond together chemically.
For example, if we have a combining ratio of 2:1 for potassium and oxygen, this means that for every two potassium atoms, there is one oxygen atom. The result is the chemical formula:
  • Potassium to Oxygen: 2:1 → \( K_2O \)
Combining ratios help map out how complex molecules are structured at an atomic level. They offer valuable insight into the chemical behavior and interaction of elements.
By comprehending how elements combine in certain proportions, we can predict and understand the properties of the resulting compounds.
Element Symbols
Element symbols are fundamental to writing chemical formulas. Each chemical element is represented by a one or two-letter symbol that derives mostly from its name, often in Latin or Greek. Element symbols are universally accepted, making communication in scientific communities clear and precise.
For instance:
  • Potassium is represented as \( K \)
  • Oxygen is \( O \)
  • Sodium as \( Na \)
  • Phosphorus as \( P \)
  • Lithium as \( Li \)
  • Nitrogen as \( N \)
Using these symbols, we construct accurate chemical formulas, such as \( Na_3PO_4 \) for sodium phosphate and \( LiNO_3 \) for lithium nitrate. Understanding these symbols is crucial, as they reflect the elemental composition of compounds.
Inorganic Chemistry
Inorganic chemistry focuses on compounds that do not involve carbon-hydrogen bonds, differing mainly from organic chemistry. It primarily deals with minerals, metals, and other non-organic compounds formed from various elements.
One common task in inorganic chemistry is formulating the chemical composition of different compounds using element symbols and combining ratios. These derivations provide insights into the material characteristics and applications.
For instance, the compound \( K_2O \) is known as potassium oxide, and it plays a major role in industrial processes. Similarly, \( Na_3PO_4 \), or sodium phosphate, finds uses in cleaning agents and detergents. These examples illustrate how understanding inorganic compounds can be pivotal in diverse fields from manufacturing to agriculture.
Studying inorganic compounds often involves exploring their reactions, synthesis, and behavior under various conditions, providing a deeper understanding of their roles in both industrial applications and natural processes.

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Most popular questions from this chapter

Define: (a) Ion (b) Isotope

Consider the elements \(\mathrm{B}\), \(\mathrm{C}\), and \(\mathrm{N}\). Using only the Periodic Table, predict which of these three elements has: (a) the largest atomic radius. (b) the smallest atomic radius. (c) the largest ionization energy. (d) the smallest ionization energy.

What is the difference between atomic number and mass number?

Answer true or false. (a) A proton and an electron have the same mass but opposite charges. (b) The mass of an electron is considerably smaller than that of a neutron. (c) An atomic mass unit (amu) is a unit of mass. (d) One amu is equal to 1 gram. (e) The protons and neutrons of an atom are found in the nucleus. (f) The electrons of an atom are found in the space surrounding the nucleus. (g) All atoms of the same element have the same number of protons. (h) All atoms of the same element have the same number of electrons. (i) Electrons and protons repel each other. (j) The size of an atom is approximately the size of its nucleus. (k) The mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of that atom. (1) For most atoms, their mass number is the same as their atomic number. (m) The three isotopes of hydrogen (hydrogen-1, hydrogen-2, and hydrogen-3) differ only in the number of neutrons in the nucleus. (n) Hydrogen-1 has one neutron in its nucleus, hydrogen-2 has two neutrons in its nucleus, and hydrogen-3 has three neutrons. (o) All isotopes of an element have the same number of electrons. (p) Most elements found on Earth are mixtures of isotopes. (q) The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth. (r) The atomic weights of most elements are whole numbers. (s) Most of the mass of an atom is found in its nucleus. (t) The density of a nucleus is its mass number expressed in grams.

In dating geological samples, scientists compare the ratio of rubidium- 87 to strontium- \(87 .\) Give the number of protons, neutrons, and electrons in an atom of each element.

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